These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Gotrek & Felix
Broken Base: Over the switch in authors from William King to Nathan Long.
Ensemble Dark Horse: Thanquol the Grey Seer is a recurring enemy in the William King novels of the series, has several novels focused on himself, and has been a recurring official character in the Skaven army books for the Warhammer game. In comparison, Gotrek and Felix themselves haven't had official game rules for several editions. To be fair, Thanquol can be portrayed pretty well on the tabletop since he isn't really too unusually powerful for a Grey Seer, but they only become more overpowered with each story.
Iron Woobie: Gotrek, essentially, is this. Except, honestly, you might die if you hugged him.